Will give brainliest is my answer correct

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.